Arch form



Oct. 28, 1930. G. o. HARM ARCH FORM' Filed Sept. 22, 1928 Patented Oct. 28, l 1930 Y -Gnonen o.V Hanni, or vrrARREN, oHIo y L applicati@ meafseijtenlber 22, 1928. 'serial no. 307,676.

, [The present 1 invention relates to' concrete forms, and aimsto'provide la novel yand 1mproved arch or center form.- i.. y y

. -Another object of the 'nventionisthe provisionfof Van arch or centerorm which may bey adjusted as to height and width, so as to be` useful betweenbeams of Vdierent heights and: spaced apart diierent 'distances ,4 efurtherfol1 `eotis thejprovision of novel t means for supporting the for'mjrom qthe `beams between whieh it is disposed.

Itis also an obJectofthe inventlonto provide an adjustable archform of the char-ae# Y ter indicated comprising a novel assembly of fthecomponent-.elements-,to 'render the form eiiicient'and practical. y y l- With thefore oing and otherfobjectsgin view, which will 4el apparent as the descriptionY proceeds, the V-invention -resides in the l constrution and arrangementfof parts, as

. ofthe form. n.. y The form comprises atop plate 7 andside plates 8 of suitable proportions.` As shown, Vthetop plate 7 is convexedor arched transversely, although it may be flat, or offany l e Yother suitable shape. The sideplates 8 are '40 flat, as shown, Y

y, Transverse angle iron ribs 9.are riveted or otherwise securedto the lower surfaoeofthe top plate 7 at theends and intermediate points, and longitudinal 'angle irons 10 are se- 5 ncured to the innerv surfaces of theside plates 8 along the upper edges thereof,` fr {Th'e plates7 and 8 are Ahingedly connected, as at 11, between thefribs 9 and angle irons 10,' thereby permittingthe sidesof the form Y to be'swungpaway from one `another to in.-

Fig. `3 is a .fragmentary bottom plan view crease l,the width ofv the form, thereby enz .I '1

`ablingthe forni tov be adjusted in width.

Channel irons 12 are riveted or otherwise y securedto theinner surfaces ofthe side plates`8 at the ends and intermediatepoints of lsaid plates, and extend upwardly and downwardly ywith their upper ends abutting'rthe angle irons 10. yLongitudinalfstiffening angle irons' 13 areV secured to the plate-s 8 fat the inner, surfacesand lower edges' thereofl bel tween the channel irons 12, and longitudinal p stiffening angle'irons livare securedtothe lower surface of the plate 7 betweenfthe ribs 9, so that the plates 7 and 8 are able .tovzwithstand pressurefromabove= v v l. y; Y,

The form is used between Ibea'msflfor the like,.and the sides are swungapart against theV lower 'flanges of Athe'^beams ,"asy seenf'in Fig'.1 I The form is supported by means of transverse cross'm'embers 1 6, each'composed of a pair of .spaeeduchannel lor angle. irons.

Plates 17 are riveted o r otherwise secured to thefribs V9, and have upwardly -divergi'ng flanges 18 riveted or otherwise secured to-,the

angle irons "14, to brace said plates, and vertical bars 19 1are riveted orotherwise secured to 'the plates 17 'and extend downwardly he# tween'theparts ofthe members 16. l

The lplates' 17 andlbars 19 providejstan# ,chiens supporting the .top ofthe form `froml fthe, members A16, and pinsbolts or ,other removable elements 20f`are inserted through the members 16 'and'barsj19.` Thelbars-1`9have vertically` spaced lapertures 21 to' receive' the elements 20, in orderthat the top of the form may be supported at diler'ent heights, therebyproviding forthe adjustment inthe height ofthe form. f f

' Latches22"are pi'voted, as at 23,'within the end portions of themembers 16 and have k fingers'A or hooks'24 to passthrough apertures 25 provided 'in' the plates'S andv channel irons 12, inorder thatv the fingers may engage over the'lowerflanges of` the beams 15'to support the :members 516 fromwhichthe remainder ofthe form is supported.r There arevertieal series of apertures 2 5-,to correspond -with Ythe, apertures ,21 lforrpurpose of verticaL adjustment of JCheV top plate 7 and by e hammer or When the form has been positioned between the beams and the latches swung'to move the lingersY 24 throughfthe corresponda ing apertures 25 and over the lower flanges of the beams 15, wedges 28 are droppe'dbe tween said latches and abutments29 secured within the members 16, and are driven dfzvwn between, said latches and abutments to clamp the side plates 8 against the beamsmand yhold the latches in engagement with said beams. The form is thus supported` from the beams whilej the concrete is poured over the form between the beams.A

VWhen the concrete has set, acarrier 'is moved underthe form, and. the Wedeesf are driven upwardly so as to release v'the latches 22, which arethen swung out of engagelouentV from .the beams 15.: The form will thenjsettlle, down on the carrier, and may be moved toanjewv position. ,A y The form is of truss construction ,transversely thereof, the members 16 forming the l bottom chord of the truss, andthe plates 17 and' barsl'?l form struts between the topand bottoni ohords ofthe truss, so,` tbettheform 1 is capable of withstanding considerable pressure from. above-4 'By adjusting the 'bers 19 with referehee to the members 16, the formV adjusted in bsghtfor beams l5 of` derehtjheigbts, end theV sides of thetorm may be swung' eport to accommodate beams spaced japart different distances or having flangesV of diierent Widths.- i il.. Havngfthlos :described the invention, what vis claimedas new is f 1 .V Artorm `offtheehaijacter described'comprsinsatom supporting moons for vthe top, and; sides, hinged tojthe 'tonehd, ,free from seid; sinorortljiie.A means seid' means.' having portions tov engage snaeed beams between vfthoh: the. form sr disposed,ahdorrangedjvto olarhn said sides eieonstsad'heems Alvform. ot. the oharaoteh desjerbeolffoommisiles, etoperneehs for adjilstobly support:- ing said top, and sides hinged to1^ the ltop endg-tree from; saidfr supporting. means, said hearingpohtoes to engage spaoed beams betweenfwhohr the oem is disposed to Clamp ,saidL sidesr against' said beams. A vform;ogthe characterfdescribedfcom'- prisingfatop, sides, supporting members for vsaid Etop,fsaid` sides beingy freezufrom said members, and vmeans carried by. saidmemb'ers -enga-geable tlrnmigfhg said sides with spaced beams between the form ifs-"disposed Y members!ehgeseeblethrough sa.

and' arranged to clamp said sides against said beams. Y

4; A form of the character described comprising atop, sides, supporting members for said top, said sides being free from said members and latches carried by said members ehsegeoble. through said sides, with spfacdlbeams/ between which the-form is disposed and arranged to clamp said sides against said beams.

5; formoth character described comprising a top, sides, supporting members for said'mtop, said sides being free from said members, latches carried by said members engageablei'througliisaid sides with spaced beamsv ybetween Wlboh the form is. disposed,` and means. for moyngjsadjatohes.,ntqiene gagement "with the -beaIlS: Clampirrg Said sdesegeihst seiidbeems i 16,-; AT1 ff e of the ,oharaoter desc rbe oom. orsihef e` top,` sides, supporting.membersfor lsedto'p, letohes Carried' by said members engageable through ,"sa'id,y sides,withl spaced beams.v between which' the formlis disposed, sedmembers. having ebutmehtsaahd Wedges movable 'between said abutment's" and.t latches to. movejthe latobes toward( and to clamp sadsidesfagainst .said beams 7i- Aftorinjofthe character desorbefgeohu'- pr'sng 5a" top and sides. supporting members,

means'for adjustably `mountingsaidQ` top on seid members saidA sides; hehgfreeeirom seidihembers, means oaizriedby said 'des with spaeedbeahis.between;whioh.that o ,is dijeposeo1A and? arranged. to elarhpsiiol,

.stohehons s'opnortihgseid top and adiest- Posing, e toit.sopoortinsmemhers, means ediustebv supporting.' seidftop from said 4me'bo'ber'sr sides hinged to the "top an'd 'free tronos, said" members,V and" means Carried 'by seid members to engage. speeedf beams. be tween which the formis disposed andarfehgef to ,Clamp sedf sdesfagV est. seid beams, said sideshaving portions forthepassage'ofjthe last named meansfinthe' diierent adjustments osei-top 51o.. ne fermo of, the, @heredar @estiba 'bslg e tobi, sides hinged thereto .aesthetiiss Vertioel'lvispooed' @porter-es 'supporting toeffloio seid: members; said; des beine-,free 'eeldifeeehefs slee .reelleVV Deseas,

' ipo and latches carried by said members engageable through said apertures with spaced v beams betweenwhich the form is disposed and arranged to clamp said sides against said beams., Y f l 11. A form of the character described comprising a top, sides hinged thereto and having vertically spaced apertures, supporting. members, means adjustably supporting said V top from said members, said sides being free from said members and supporting means, latches carried by said members engageable through said apertures with spaced beams between which the form is disposed, the latches f having portions to Contact with the inner-surf-k faces of said sides, and means for moving said latches toward said beams to clamp said sides against said beams.

In testimony whereof I hereunto aix my signature. v 2 GEORGE o. HARMl 

